Worcester 87161073030 Filling Loop

The filling loop is a part that only occurs on systems that deal with central heating. The filling loop allows the user to manually modify the amount of water within the central heating system if the pressure has dropped to low. Filling loops can be internal or external, depending on the type of appliance you have. If the loop is external, it will usually be removable as the water regulations state that the loop must be removed after use. However, if the loop is internal, there is usually a key that can be removed to interrupt the filling loop connection after use.